When add node or update node func is called, all DaemonSets are enqueued to workqueue
of DaemonSet Controller. The consumer of the workqueue does an iteration of node.List
for every DaemonSet in the workqueue.

This change examinate the daemonSet before we enqueue it into DaemonSetController's work queue.
It will enqueue the DaemonSet only when it is related to the changed node.